Complete page / post revision maint (#13)

- Fix log on redirection
- Move page handlers to its own file
- Add version to admin area footer
- Move generator to HttpContext extension property

src/MyWebLog/Caches.fs

@@ -9,8 +9,12 @@ module Extensions =
     
     open System.Security.Claims
     open Microsoft.AspNetCore.Antiforgery
+    open Microsoft.Extensions.Configuration
     open Microsoft.Extensions.DependencyInjection
     
+    /// Hold variable for the configured generator string
+    let mutable private generatorString : string option = None
+    
     type HttpContext with
         
         /// The anti-CSRF service
@@ -22,6 +26,18 @@ module Extensions =
         /// The data implementation
         member this.Data = this.RequestServices.GetRequiredService<IData> ()
         
+        /// The generator string
+        member this.Generator =
+            match generatorString with
+            | Some gen -> gen
+            | None ->
+                let cfg = this.RequestServices.GetRequiredService<IConfiguration> ()
+                generatorString <-
+                    match Option.ofObj cfg["Generator"] with
+                    | Some gen -> Some gen
+                    | None -> Some "generator not configured"
+                generatorString.Value
+
         /// The user ID for the current request
         member this.UserId =
             WebLogUserId (this.User.Claims |> Seq.find (fun c -> c.Type = ClaimTypes.NameIdentifier)).Value

src/MyWebLog/Handlers/Admin.fs

@@ -118,218 +118,8 @@ let deleteCategory catId : HttpHandler = fun next ctx -> task {
     return! listCategoriesBare next ctx
 }
 
-// -- PAGES --
-
-// GET /admin/pages
-// GET /admin/pages/page/{pageNbr}
-let listPages pageNbr : HttpHandler = fun next ctx -> task {
-    let  webLog = ctx.WebLog
-    let! pages  = ctx.Data.Page.findPageOfPages webLog.id pageNbr
-    return!
-        Hash.FromAnonymousObject {|
-            page_title = "Pages"
-            csrf       = ctx.CsrfTokenSet
-            pages      = pages |> List.map (DisplayPage.fromPageMinimal webLog)
-            page_nbr   = pageNbr
-            prev_page  = if pageNbr = 2 then "" else $"/page/{pageNbr - 1}"
-            next_page  = $"/page/{pageNbr + 1}"
-        |}
-        |> viewForTheme "admin" "page-list" next ctx
-}
-
-// GET /admin/page/{id}/edit
-let editPage pgId : HttpHandler = fun next ctx -> task {
-    let! result = task {
-        match pgId with
-        | "new" -> return Some ("Add a New Page", { Page.empty with id = PageId "new" })
-        | _ ->
-            match! ctx.Data.Page.findFullById (PageId pgId) ctx.WebLog.id with
-            | Some page -> return Some ("Edit Page", page)
-            | None -> return None
-    }
-    match result with
-    | Some (title, page) ->
-        let  model     = EditPageModel.fromPage page
-        let! templates = templatesForTheme ctx "page"
-        return!
-            Hash.FromAnonymousObject {|
-                page_title = title
-                csrf       = ctx.CsrfTokenSet
-                model      = model
-                metadata   = Array.zip model.metaNames model.metaValues
-                             |> Array.mapi (fun idx (name, value) -> [| string idx; name; value |])
-                templates  = templates
-            |}
-            |> viewForTheme "admin" "page-edit" next ctx
-    | None -> return! Error.notFound next ctx
-}
-
-// POST /admin/page/{id}/delete
-let deletePage pgId : HttpHandler = fun next ctx -> task {
-    let webLog = ctx.WebLog
-    match! ctx.Data.Page.delete (PageId pgId) webLog.id with
-    | true ->
-        do! PageListCache.update ctx
-        do! addMessage ctx { UserMessage.success with message = "Page deleted successfully" }
-    | false -> do! addMessage ctx { UserMessage.error with message = "Page not found; nothing deleted" }
-    return! redirectToGet "admin/pages" next ctx
-}
-
-// GET /admin/page/{id}/permalinks
-let editPagePermalinks pgId : HttpHandler = fun next ctx -> task {
-    match! ctx.Data.Page.findFullById (PageId pgId) ctx.WebLog.id with
-    | Some pg ->
-        return!
-            Hash.FromAnonymousObject {|
-                page_title = "Manage Prior Permalinks"
-                csrf       = ctx.CsrfTokenSet
-                model      = ManagePermalinksModel.fromPage pg
-            |}
-            |> viewForTheme "admin" "permalinks" next ctx
-    | None -> return! Error.notFound next ctx
-}
-
-// POST /admin/page/permalinks
-let savePagePermalinks : HttpHandler = fun next ctx -> task {
-    let  webLog = ctx.WebLog
-    let! model  = ctx.BindFormAsync<ManagePermalinksModel> ()
-    let  links  = model.prior |> Array.map Permalink |> List.ofArray
-    match! ctx.Data.Page.updatePriorPermalinks (PageId model.id) webLog.id links with
-    | true ->
-        do! addMessage ctx { UserMessage.success with message = "Page permalinks saved successfully" }
-        return! redirectToGet $"admin/page/{model.id}/permalinks" next ctx
-    | false -> return! Error.notFound next ctx
-}
-
-// GET /admin/page/{id}/revisions
-let editPageRevisions pgId : HttpHandler = fun next ctx -> task {
-    let webLog = ctx.WebLog
-    match! ctx.Data.Page.findFullById (PageId pgId) webLog.id with
-    | Some pg ->
-        return!
-            Hash.FromAnonymousObject {|
-                page_title = "Manage Page Revisions"
-                csrf       = ctx.CsrfTokenSet
-                model      = ManageRevisionsModel.fromPage webLog pg
-            |}
-            |> viewForTheme "admin" "revisions" next ctx
-    | None -> return! Error.notFound next ctx
-}
-
-// GET /admin/page/{id}/revisions/purge
-let purgePageRevisions pgId : HttpHandler = fun next ctx -> task {
-    let webLog = ctx.WebLog
-    let data   = ctx.Data
-    match! data.Page.findFullById (PageId pgId) webLog.id with
-    | Some pg ->
-        do! data.Page.update { pg with revisions = [ List.head pg.revisions ] }
-        do! addMessage ctx { UserMessage.success with message = "Prior revisions purged successfully" }
-        return! redirectToGet $"admin/page/{pgId}/revisions" next ctx
-    | None -> return! Error.notFound next ctx
-}
-
 open Microsoft.AspNetCore.Http
 
-/// Find the page and the requested revision
-let private findPageRevision pgId revDate (ctx : HttpContext) = task {
-    match! ctx.Data.Page.findFullById (PageId pgId) ctx.WebLog.id with
-    | Some pg ->
-        let asOf = parseToUtc revDate
-        return Some pg, pg.revisions |> List.tryFind (fun r -> r.asOf = asOf)
-    | None -> return None, None
-}
-
-// GET /admin/page/{id}/revision/{revision-date}/preview
-let previewPageRevision (pgId, revDate) : HttpHandler = fun next ctx -> task {
-    match! findPageRevision pgId revDate ctx with
-    | Some _, Some rev ->
-        return! bareForTheme "admin" "" next ctx (Hash.FromAnonymousObject {| content = MarkupText.toHtml rev.text |})
-    | None, _
-    | _, None -> return! Error.notFound next ctx
-}
-
-open System
-
-// POST /admin/page/{id}/revision/{revision-date}/restore
-let restorePageRevision (pgId, revDate) : HttpHandler = fun next ctx -> task {
-    match! findPageRevision pgId revDate ctx with
-    | Some pg, Some rev ->
-        do! ctx.Data.Page.update
-                { pg with
-                    revisions = { rev with asOf = DateTime.UtcNow }
-                                  :: (pg.revisions |> List.filter (fun r -> r.asOf <> rev.asOf))
-                }
-        do! addMessage ctx { UserMessage.success with message = "Revision restored successfully" }
-        return! redirectToGet $"admin/page/{pgId}/revisions" next ctx
-    | None, _
-    | _, None -> return! Error.notFound next ctx
-}
-
-// POST /admin/page/{id}/revision/{revision-date}/delete
-let deletePageRevision (pgId, revDate) : HttpHandler = fun next ctx -> task {
-    match! findPageRevision pgId revDate ctx with
-    | Some pg, Some rev ->
-        do! ctx.Data.Page.update { pg with revisions = pg.revisions |> List.filter (fun r -> r.asOf <> rev.asOf) }
-        do! addMessage ctx { UserMessage.success with message = "Revision deleted successfully" }
-        return! bareForTheme "admin" "" next ctx (Hash.FromAnonymousObject {| content = "" |})
-    | None, _
-    | _, None -> return! Error.notFound next ctx
-}
-
-#nowarn "3511"
-
-// POST /admin/page/save
-let savePage : HttpHandler = fun next ctx -> task {
-    let! model  = ctx.BindFormAsync<EditPageModel> ()
-    let  webLog = ctx.WebLog
-    let  data   = ctx.Data
-    let  now    = DateTime.UtcNow
-    let! pg     = task {
-        match model.pageId with
-        | "new" ->
-            return Some
-                { Page.empty with
-                    id          = PageId.create ()
-                    webLogId    = webLog.id
-                    authorId    = ctx.UserId
-                    publishedOn = now
-                }
-        | pgId -> return! data.Page.findFullById (PageId pgId) webLog.id
-    }
-    match pg with
-    | Some page ->
-        let updateList = page.showInPageList <> model.isShownInPageList
-        let revision   = { asOf = now; text = MarkupText.parse $"{model.source}: {model.text}" }
-        // Detect a permalink change, and add the prior one to the prior list
-        let page =
-            match Permalink.toString page.permalink with
-            | "" -> page
-            | link when link = model.permalink -> page
-            | _ -> { page with priorPermalinks = page.permalink :: page.priorPermalinks }
-        let page =
-            { page with
-                title          = model.title
-                permalink      = Permalink model.permalink
-                updatedOn      = now
-                showInPageList = model.isShownInPageList
-                template       = match model.template with "" -> None | tmpl -> Some tmpl
-                text           = MarkupText.toHtml revision.text
-                metadata       = Seq.zip model.metaNames model.metaValues
-                                 |> Seq.filter (fun it -> fst it > "")
-                                 |> Seq.map (fun it -> { name = fst it; value = snd it })
-                                 |> Seq.sortBy (fun it -> $"{it.name.ToLower ()} {it.value.ToLower ()}")
-                                 |> List.ofSeq
-                revisions      = match page.revisions |> List.tryHead with
-                                 | Some r when r.text = revision.text -> page.revisions
-                                 | _ -> revision :: page.revisions
-            }
-        do! (if model.pageId = "new" then data.Page.add else data.Page.update) page
-        if updateList then do! PageListCache.update ctx
-        do! addMessage ctx { UserMessage.success with message = "Page saved successfully" }
-        return! redirectToGet $"admin/page/{PageId.toString page.id}/edit" next ctx
-    | None -> return! Error.notFound next ctx
-}
-
 // -- TAG MAPPINGS --
 
 /// Get the hash necessary to render the tag mapping list
@@ -407,6 +197,7 @@ let deleteMapping tagMapId : HttpHandler = fun next ctx -> task {
 
 // -- THEMES --
 
+open System
 open System.IO
 open System.IO.Compression
 open System.Text.RegularExpressions

src/MyWebLog/Handlers/Feed.fs

@@ -382,7 +382,7 @@ let createFeed (feedType : FeedType) posts : HttpHandler = fun next ctx -> backg
     setTitleAndDescription feedType webLog cats feed
     
     feed.LastUpdatedTime <- (List.head posts).updatedOn |> DateTimeOffset
-    feed.Generator       <- generator ctx
+    feed.Generator       <- ctx.Generator
     feed.Items           <- posts |> Seq.ofList |> Seq.map toItem
     feed.Language        <- "en"
     feed.Id              <- WebLog.absoluteUrl webLog link

src/MyWebLog/Handlers/Helpers.fs

@@ -52,24 +52,6 @@ let messages (ctx : HttpContext) = task {
     | None -> return [||]
 }
 
-/// Hold variable for the configured generator string
-let mutable private generatorString : string option = None
-
-open Microsoft.Extensions.Configuration
-open Microsoft.Extensions.DependencyInjection
-
-/// Get the generator string
-let generator (ctx : HttpContext) =
-    match generatorString with
-    | Some gen -> gen
-    | None ->
-        let cfg = ctx.RequestServices.GetRequiredService<IConfiguration> ()
-        generatorString <-
-            match Option.ofObj cfg["Generator"] with
-            | Some gen -> Some gen
-            | None -> Some "generator not configured"
-        generatorString.Value
-
 open MyWebLog
 open DotLiquid
 
@@ -94,7 +76,7 @@ let private populateHash hash ctx = task {
     hash.Add ("page_list",    PageListCache.get ctx)
     hash.Add ("current_page", ctx.Request.Path.Value.Substring 1)
     hash.Add ("messages",     messages)
-    hash.Add ("generator",    generator ctx)
+    hash.Add ("generator",    ctx.Generator)
     hash.Add ("htmx_script",  htmxScript)
     
     do! commitSession ctx
@@ -219,6 +201,7 @@ open System.Globalization
 let parseToUtc (date : string) =
     DateTime.Parse (date, null, DateTimeStyles.AdjustToUniversal)
 
+open Microsoft.Extensions.DependencyInjection
 open Microsoft.Extensions.Logging
 
 /// Log level for debugging

src/MyWebLog/Handlers/Page.fs

@@ -0,0 +1,221 @@
+/// Handlers to manipulate pages
+module MyWebLog.Handlers.Page
+
+open DotLiquid
+open Giraffe
+open MyWebLog
+open MyWebLog.ViewModels
+
+// GET /admin/pages
+// GET /admin/pages/page/{pageNbr}
+let all pageNbr : HttpHandler = fun next ctx -> task {
+    let  webLog = ctx.WebLog
+    let! pages  = ctx.Data.Page.findPageOfPages webLog.id pageNbr
+    return!
+        Hash.FromAnonymousObject {|
+            page_title = "Pages"
+            csrf       = ctx.CsrfTokenSet
+            pages      = pages |> List.map (DisplayPage.fromPageMinimal webLog)
+            page_nbr   = pageNbr
+            prev_page  = if pageNbr = 2 then "" else $"/page/{pageNbr - 1}"
+            next_page  = $"/page/{pageNbr + 1}"
+        |}
+        |> viewForTheme "admin" "page-list" next ctx
+}
+
+// GET /admin/page/{id}/edit
+let edit pgId : HttpHandler = fun next ctx -> task {
+    let! result = task {
+        match pgId with
+        | "new" -> return Some ("Add a New Page", { Page.empty with id = PageId "new" })
+        | _ ->
+            match! ctx.Data.Page.findFullById (PageId pgId) ctx.WebLog.id with
+            | Some page -> return Some ("Edit Page", page)
+            | None -> return None
+    }
+    match result with
+    | Some (title, page) ->
+        let  model     = EditPageModel.fromPage page
+        let! templates = templatesForTheme ctx "page"
+        return!
+            Hash.FromAnonymousObject {|
+                page_title = title
+                csrf       = ctx.CsrfTokenSet
+                model      = model
+                metadata   = Array.zip model.metaNames model.metaValues
+                             |> Array.mapi (fun idx (name, value) -> [| string idx; name; value |])
+                templates  = templates
+            |}
+            |> viewForTheme "admin" "page-edit" next ctx
+    | None -> return! Error.notFound next ctx
+}
+
+// POST /admin/page/{id}/delete
+let delete pgId : HttpHandler = fun next ctx -> task {
+    let webLog = ctx.WebLog
+    match! ctx.Data.Page.delete (PageId pgId) webLog.id with
+    | true ->
+        do! PageListCache.update ctx
+        do! addMessage ctx { UserMessage.success with message = "Page deleted successfully" }
+    | false -> do! addMessage ctx { UserMessage.error with message = "Page not found; nothing deleted" }
+    return! redirectToGet "admin/pages" next ctx
+}
+
+// GET /admin/page/{id}/permalinks
+let editPermalinks pgId : HttpHandler = fun next ctx -> task {
+    match! ctx.Data.Page.findFullById (PageId pgId) ctx.WebLog.id with
+    | Some pg ->
+        return!
+            Hash.FromAnonymousObject {|
+                page_title = "Manage Prior Permalinks"
+                csrf       = ctx.CsrfTokenSet
+                model      = ManagePermalinksModel.fromPage pg
+            |}
+            |> viewForTheme "admin" "permalinks" next ctx
+    | None -> return! Error.notFound next ctx
+}
+
+// POST /admin/page/permalinks
+let savePermalinks : HttpHandler = fun next ctx -> task {
+    let  webLog = ctx.WebLog
+    let! model  = ctx.BindFormAsync<ManagePermalinksModel> ()
+    let  links  = model.prior |> Array.map Permalink |> List.ofArray
+    match! ctx.Data.Page.updatePriorPermalinks (PageId model.id) webLog.id links with
+    | true ->
+        do! addMessage ctx { UserMessage.success with message = "Page permalinks saved successfully" }
+        return! redirectToGet $"admin/page/{model.id}/permalinks" next ctx
+    | false -> return! Error.notFound next ctx
+}
+
+// GET /admin/page/{id}/revisions
+let editRevisions pgId : HttpHandler = fun next ctx -> task {
+    let webLog = ctx.WebLog
+    match! ctx.Data.Page.findFullById (PageId pgId) webLog.id with
+    | Some pg ->
+        return!
+            Hash.FromAnonymousObject {|
+                page_title = "Manage Page Revisions"
+                csrf       = ctx.CsrfTokenSet
+                model      = ManageRevisionsModel.fromPage webLog pg
+            |}
+            |> viewForTheme "admin" "revisions" next ctx
+    | None -> return! Error.notFound next ctx
+}
+
+// GET /admin/page/{id}/revisions/purge
+let purgeRevisions pgId : HttpHandler = fun next ctx -> task {
+    let webLog = ctx.WebLog
+    let data   = ctx.Data
+    match! data.Page.findFullById (PageId pgId) webLog.id with
+    | Some pg ->
+        do! data.Page.update { pg with revisions = [ List.head pg.revisions ] }
+        do! addMessage ctx { UserMessage.success with message = "Prior revisions purged successfully" }
+        return! redirectToGet $"admin/page/{pgId}/revisions" next ctx
+    | None -> return! Error.notFound next ctx
+}
+
+open Microsoft.AspNetCore.Http
+
+/// Find the page and the requested revision
+let private findPageRevision pgId revDate (ctx : HttpContext) = task {
+    match! ctx.Data.Page.findFullById (PageId pgId) ctx.WebLog.id with
+    | Some pg ->
+        let asOf = parseToUtc revDate
+        return Some pg, pg.revisions |> List.tryFind (fun r -> r.asOf = asOf)
+    | None -> return None, None
+}
+
+// GET /admin/page/{id}/revision/{revision-date}/preview
+let previewRevision (pgId, revDate) : HttpHandler = fun next ctx -> task {
+    match! findPageRevision pgId revDate ctx with
+    | Some _, Some rev ->
+        return!
+            Hash.FromAnonymousObject {|
+                content = $"""<div class="mwl-revision-preview mb-3">{MarkupText.toHtml rev.text}</div>"""
+            |}
+            |> bareForTheme "admin" "" next ctx
+    | None, _
+    | _, None -> return! Error.notFound next ctx
+}
+
+open System
+
+// POST /admin/page/{id}/revision/{revision-date}/restore
+let restoreRevision (pgId, revDate) : HttpHandler = fun next ctx -> task {
+    match! findPageRevision pgId revDate ctx with
+    | Some pg, Some rev ->
+        do! ctx.Data.Page.update
+                { pg with
+                    revisions = { rev with asOf = DateTime.UtcNow }
+                                  :: (pg.revisions |> List.filter (fun r -> r.asOf <> rev.asOf))
+                }
+        do! addMessage ctx { UserMessage.success with message = "Revision restored successfully" }
+        return! redirectToGet $"admin/page/{pgId}/revisions" next ctx
+    | None, _
+    | _, None -> return! Error.notFound next ctx
+}
+
+// POST /admin/page/{id}/revision/{revision-date}/delete
+let deleteRevision (pgId, revDate) : HttpHandler = fun next ctx -> task {
+    match! findPageRevision pgId revDate ctx with
+    | Some pg, Some rev ->
+        do! ctx.Data.Page.update { pg with revisions = pg.revisions |> List.filter (fun r -> r.asOf <> rev.asOf) }
+        do! addMessage ctx { UserMessage.success with message = "Revision deleted successfully" }
+        return! bareForTheme "admin" "" next ctx (Hash.FromAnonymousObject {| content = "" |})
+    | None, _
+    | _, None -> return! Error.notFound next ctx
+}
+
+#nowarn "3511"
+
+// POST /admin/page/save
+let save : HttpHandler = fun next ctx -> task {
+    let! model  = ctx.BindFormAsync<EditPageModel> ()
+    let  webLog = ctx.WebLog
+    let  data   = ctx.Data
+    let  now    = DateTime.UtcNow
+    let! pg     = task {
+        match model.pageId with
+        | "new" ->
+            return Some
+                { Page.empty with
+                    id          = PageId.create ()
+                    webLogId    = webLog.id
+                    authorId    = ctx.UserId
+                    publishedOn = now
+                }
+        | pgId -> return! data.Page.findFullById (PageId pgId) webLog.id
+    }
+    match pg with
+    | Some page ->
+        let updateList = page.showInPageList <> model.isShownInPageList
+        let revision   = { asOf = now; text = MarkupText.parse $"{model.source}: {model.text}" }
+        // Detect a permalink change, and add the prior one to the prior list
+        let page =
+            match Permalink.toString page.permalink with
+            | "" -> page
+            | link when link = model.permalink -> page
+            | _ -> { page with priorPermalinks = page.permalink :: page.priorPermalinks }
+        let page =
+            { page with
+                title          = model.title
+                permalink      = Permalink model.permalink
+                updatedOn      = now
+                showInPageList = model.isShownInPageList
+                template       = match model.template with "" -> None | tmpl -> Some tmpl
+                text           = MarkupText.toHtml revision.text
+                metadata       = Seq.zip model.metaNames model.metaValues
+                                 |> Seq.filter (fun it -> fst it > "")
+                                 |> Seq.map (fun it -> { name = fst it; value = snd it })
+                                 |> Seq.sortBy (fun it -> $"{it.name.ToLower ()} {it.value.ToLower ()}")
+                                 |> List.ofSeq
+                revisions      = match page.revisions |> List.tryHead with
+                                 | Some r when r.text = revision.text -> page.revisions
+                                 | _ -> revision :: page.revisions
+            }
+        do! (if model.pageId = "new" then data.Page.add else data.Page.update) page
+        if updateList then do! PageListCache.update ctx
+        do! addMessage ctx { UserMessage.success with message = "Page saved successfully" }
+        return! redirectToGet $"admin/page/{PageId.toString page.id}/edit" next ctx
+    | None -> return! Error.notFound next ctx
+}

src/MyWebLog/Handlers/Post.fs

@@ -256,6 +256,15 @@ let edit postId : HttpHandler = fun next ctx -> task {
     | None -> return! Error.notFound next ctx
 }
 
+// POST /admin/post/{id}/delete
+let delete postId : HttpHandler = fun next ctx -> task {
+    let webLog = ctx.WebLog
+    match! ctx.Data.Post.delete (PostId postId) webLog.id with
+    | true  -> do! addMessage ctx { UserMessage.success with message = "Post deleted successfully" }
+    | false -> do! addMessage ctx { UserMessage.error with message = "Post not found; nothing deleted" }
+    return! redirectToGet "admin/posts" next ctx
+}
+
 // GET /admin/post/{id}/permalinks
 let editPermalinks postId : HttpHandler = fun next ctx -> task {
     match! ctx.Data.Post.findFullById (PostId postId) ctx.WebLog.id with
@@ -282,13 +291,79 @@ let savePermalinks : HttpHandler = fun next ctx -> task {
     | false -> return! Error.notFound next ctx
 }
 
-// POST /admin/post/{id}/delete
+// GET /admin/post/{id}/revisions
-let delete postId : HttpHandler = fun next ctx -> task {
+let editRevisions postId : HttpHandler = fun next ctx -> task {
-    let webLog = ctx.WebLog
+    match! ctx.Data.Post.findFullById (PostId postId) ctx.WebLog.id with
-    match! ctx.Data.Post.delete (PostId postId) webLog.id with
+    | Some post ->
-    | true  -> do! addMessage ctx { UserMessage.success with message = "Post deleted successfully" }
+        return!
-    | false -> do! addMessage ctx { UserMessage.error with message = "Post not found; nothing deleted" }
+            Hash.FromAnonymousObject {|
-    return! redirectToGet "admin/posts" next ctx
+                page_title = "Manage Post Revisions"
+                csrf       = ctx.CsrfTokenSet
+                model      = ManageRevisionsModel.fromPost ctx.WebLog post
+            |}
+            |> viewForTheme "admin" "revisions" next ctx
+    | None -> return! Error.notFound next ctx
+}
+
+// GET /admin/post/{id}/revisions/purge
+let purgeRevisions postId : HttpHandler = fun next ctx -> task {
+    let data = ctx.Data
+    match! data.Post.findFullById (PostId postId) ctx.WebLog.id with
+    | Some post ->
+        do! data.Post.update { post with revisions = [ List.head post.revisions ] }
+        do! addMessage ctx { UserMessage.success with message = "Prior revisions purged successfully" }
+        return! redirectToGet $"admin/post/{postId}/revisions" next ctx
+    | None -> return! Error.notFound next ctx
+}
+
+open Microsoft.AspNetCore.Http
+
+/// Find the post and the requested revision
+let private findPostRevision postId revDate (ctx : HttpContext) = task {
+    match! ctx.Data.Post.findFullById (PostId postId) ctx.WebLog.id with
+    | Some post ->
+        let asOf = parseToUtc revDate
+        return Some post, post.revisions |> List.tryFind (fun r -> r.asOf = asOf)
+    | None -> return None, None
+}
+
+// GET /admin/post/{id}/revision/{revision-date}/preview
+let previewRevision (postId, revDate) : HttpHandler = fun next ctx -> task {
+    match! findPostRevision postId revDate ctx with
+    | Some _, Some rev ->
+        return!
+            Hash.FromAnonymousObject {|
+                content = $"""<div class="mwl-revision-preview mb-3">{MarkupText.toHtml rev.text}</div>"""
+            |}
+            |> bareForTheme "admin" "" next ctx
+    | None, _
+    | _, None -> return! Error.notFound next ctx
+}
+
+// POST /admin/post/{id}/revision/{revision-date}/restore
+let restoreRevision (postId, revDate) : HttpHandler = fun next ctx -> task {
+    match! findPostRevision postId revDate ctx with
+    | Some post, Some rev ->
+        do! ctx.Data.Post.update
+                { post with
+                    revisions = { rev with asOf = DateTime.UtcNow }
+                                  :: (post.revisions |> List.filter (fun r -> r.asOf <> rev.asOf))
+                }
+        do! addMessage ctx { UserMessage.success with message = "Revision restored successfully" }
+        return! redirectToGet $"admin/post/{postId}/revisions" next ctx
+    | None, _
+    | _, None -> return! Error.notFound next ctx
+}
+
+// POST /admin/post/{id}/revision/{revision-date}/delete
+let deleteRevision (postId, revDate) : HttpHandler = fun next ctx -> task {
+    match! findPostRevision postId revDate ctx with
+    | Some post, Some rev ->
+        do! ctx.Data.Post.update { post with revisions = post.revisions |> List.filter (fun r -> r.asOf <> rev.asOf) }
+        do! addMessage ctx { UserMessage.success with message = "Revision deleted successfully" }
+        return! bareForTheme "admin" "" next ctx (Hash.FromAnonymousObject {| content = "" |})
+    | None, _
+    | _, None -> return! Error.notFound next ctx
 }
 
 #nowarn "3511"

src/MyWebLog/Handlers/Routes.fs

@@ -29,7 +29,7 @@ module CatchAll =
             // Current post
             match data.Post.findByPermalink permalink webLog.id |> await with
             | Some post ->
-                debug (fun () -> $"Found post by permalink")
+                debug (fun () -> "Found post by permalink")
                 let model = Post.preparePostList webLog [ post ] Post.ListType.SinglePost "" 1 1 ctx data |> await
                 model.Add ("page_title", post.title)
                 yield fun next ctx -> themedView (defaultArg post.template "single-post") next ctx model
@@ -37,7 +37,7 @@ module CatchAll =
             // Current page
             match data.Page.findByPermalink permalink webLog.id |> await with
             | Some page ->
-                debug (fun () -> $"Found page by permalink")
+                debug (fun () -> "Found page by permalink")
                 yield fun next ctx ->
                     Hash.FromAnonymousObject {|
                         page_title = page.title
@@ -50,7 +50,7 @@ module CatchAll =
             // RSS feed
             match Feed.deriveFeedType ctx textLink with
             | Some (feedType, postCount) ->
-                debug (fun () -> $"Found RSS feed")
+                debug (fun () -> "Found RSS feed")
                 yield Feed.generate feedType postCount 
             | None -> ()
             // Post differing only by trailing slash
@@ -58,28 +58,28 @@ module CatchAll =
                 Permalink (if textLink.EndsWith "/" then textLink[1..textLink.Length - 2] else $"{textLink[1..]}/")
             match data.Post.findByPermalink altLink webLog.id |> await with
             | Some post ->
-                debug (fun () -> $"Found post by trailing-slash-agnostic permalink")
+                debug (fun () -> "Found post by trailing-slash-agnostic permalink")
                 yield redirectTo true (WebLog.relativeUrl webLog post.permalink)
             | None -> ()
             // Page differing only by trailing slash
             match data.Page.findByPermalink altLink webLog.id |> await with
             | Some page ->
-                debug (fun () -> $"Found page by trailing-slash-agnostic permalink")
+                debug (fun () -> "Found page by trailing-slash-agnostic permalink")
                 yield redirectTo true (WebLog.relativeUrl webLog page.permalink)
             | None -> ()
             // Prior post
             match data.Post.findCurrentPermalink [ permalink; altLink ] webLog.id |> await with
             | Some link ->
-                debug (fun () -> $"Found post by prior permalink")
+                debug (fun () -> "Found post by prior permalink")
                 yield redirectTo true (WebLog.relativeUrl webLog link)
             | None -> ()
             // Prior page
             match data.Page.findCurrentPermalink [ permalink; altLink ] webLog.id |> await with
             | Some link ->
-                debug (fun () -> $"Found page by prior permalink")
+                debug (fun () -> "Found page by prior permalink")
                 yield redirectTo true (WebLog.relativeUrl webLog link)
             | None -> ()
-            debug (fun () -> $"No content found")
+            debug (fun () -> "No content found")
         }
 
     // GET {all-of-the-above}
@@ -119,18 +119,20 @@ let router : HttpHandler = choose [
             ])
             route    "/dashboard" >=> Admin.dashboard
             subRoute "/page" (choose [
-                route  "s"                       >=> Admin.listPages 1
+                route  "s"                       >=> Page.all 1
-                routef "s/page/%i"                   Admin.listPages
+                routef "s/page/%i"                   Page.all
-                routef "/%s/edit"                    Admin.editPage
+                routef "/%s/edit"                    Page.edit
-                routef "/%s/permalinks"              Admin.editPagePermalinks
+                routef "/%s/permalinks"              Page.editPermalinks
-                routef "/%s/revision/%s/preview"     Admin.previewPageRevision
+                routef "/%s/revision/%s/preview"     Page.previewRevision
-                routef "/%s/revisions"               Admin.editPageRevisions
+                routef "/%s/revisions"               Page.editRevisions
             ])
             subRoute "/post" (choose [
                 route  "s"                       >=> Post.all 1
                 routef "s/page/%i"                   Post.all
                 routef "/%s/edit"                    Post.edit
                 routef "/%s/permalinks"              Post.editPermalinks
+                routef "/%s/revision/%s/preview"     Post.previewRevision
+                routef "/%s/revisions"               Post.editRevisions
             ])
             subRoute "/settings" (choose [
                 route ""     >=> Admin.settings
@@ -157,17 +159,20 @@ let router : HttpHandler = choose [
                 routef "/%s/delete"     Admin.deleteCategory
             ])
             subRoute "/page" (choose [
-                route  "/save"                   >=> Admin.savePage
+                route  "/save"                   >=> Page.save
-                route  "/permalinks"             >=> Admin.savePagePermalinks
+                route  "/permalinks"             >=> Page.savePermalinks
-                routef "/%s/delete"                  Admin.deletePage
+                routef "/%s/delete"                  Page.delete
-                routef "/%s/revision/%s/delete"      Admin.deletePageRevision
+                routef "/%s/revision/%s/delete"      Page.deleteRevision
-                routef "/%s/revision/%s/restore"     Admin.restorePageRevision
+                routef "/%s/revision/%s/restore"     Page.restoreRevision
-                routef "/%s/revisions/purge"         Admin.purgePageRevisions
+                routef "/%s/revisions/purge"         Page.purgeRevisions
             ])
             subRoute "/post" (choose [
                 route  "/save"                   >=> Post.save
                 route  "/permalinks"             >=> Post.savePermalinks
                 routef "/%s/delete"                  Post.delete
+                routef "/%s/revision/%s/delete"      Post.deleteRevision
+                routef "/%s/revision/%s/restore"     Post.restoreRevision
+                routef "/%s/revisions/purge"         Post.purgeRevisions
             ])
             subRoute "/settings" (choose [
                 route ""     >=> Admin.saveSettings

src/MyWebLog/Handlers/User.fs

@@ -41,8 +41,7 @@ open Microsoft.AspNetCore.Authentication.Cookies
 // POST /user/log-on
 let doLogOn : HttpHandler = fun next ctx -> task {
     let! model = ctx.BindFormAsync<LogOnModel> ()
-    let  webLog = ctx.WebLog
+    match! ctx.Data.WebLogUser.findByEmail model.emailAddress ctx.WebLog.id with 
-    match! ctx.Data.WebLogUser.findByEmail model.emailAddress webLog.id with 
     | Some user when user.passwordHash = hashedPassword model.password user.userName user.salt ->
         let claims = seq {
             Claim (ClaimTypes.NameIdentifier, WebLogUserId.toString user.id)
@@ -55,8 +54,8 @@ let doLogOn : HttpHandler = fun next ctx -> task {
         do! ctx.SignInAsync (identity.AuthenticationType, ClaimsPrincipal identity,
             AuthenticationProperties (IssuedUtc = DateTimeOffset.UtcNow))
         do! addMessage ctx
-                { UserMessage.success with message = $"Logged on successfully | Welcome to {webLog.name}!" }
+                { UserMessage.success with message = $"Logged on successfully | Welcome to {ctx.WebLog.name}!" }
-        return! redirectToGet (defaultArg model.returnTo "admin/dashboard") next ctx
+        return! redirectToGet (defaultArg (model.returnTo |> Option.map (fun it -> it[1..])) "admin/dashboard") next ctx
     | _ ->
         do! addMessage ctx { UserMessage.error with message = "Log on attempt unsuccessful" }
         return! logOn model.returnTo next ctx

src/MyWebLog/MyWebLog.fsproj

@@ -16,6 +16,7 @@
     <Compile Include="Handlers\Helpers.fs" />
     <Compile Include="Handlers\Admin.fs" />
     <Compile Include="Handlers\Feed.fs" />
+    <Compile Include="Handlers\Page.fs" />
     <Compile Include="Handlers\Post.fs" />
     <Compile Include="Handlers\User.fs" />
     <Compile Include="Handlers\Upload.fs" />

src/admin-theme/_layout.liquid

@@ -48,6 +48,8 @@
   <div class="container-fluid">
     <div class="row">
       <div class="col-xs-12 text-end">
+        {%- assign version = generator | split: " " -%}
+        <small class="me-1 align-baseline">v{{ version[1] }}</small>
         <img src="{{ "themes/admin/logo-light.png" | relative_link }}" alt="myWebLog" width="120" height="34">
       </div>
     </div>

src/admin-theme/post-edit.liquid

@@ -16,8 +16,15 @@
                    value="{{ model.permalink }}">
             <label for="permalink">Permalink</label>
             {%- if model.post_id != "new" %}
-              {%- capture perm_edit %}admin/post/{{ model.post_id }}/permalinks{% endcapture -%}
+              <span class="form-text">
-              <span class="form-text"><a href="{{ perm_edit | relative_link }}">Manage Permalinks</a></span>
+                <a href="{{ "admin/post/" | append: model.post_id | append: "/permalinks" | relative_link }}">
+                  Manage Permalinks
+                </a>
+                <span class="text-muted"> &bull; </span>
+                <a href="{{ "admin/post/" | append: model.post_id | append: "/revisions" | relative_link }}">
+                  Manage Revisions
+                </a>
+              </span>
             {% endif -%}
           </div>
           <div class="mb-2">

src/admin-theme/revisions.liquid

@@ -3,7 +3,7 @@
   <form method="post" hx-target="body">
     <input type="hidden" name="{{ csrf.form_field_name }}" value="{{ csrf.request_token }}">
     <input type="hidden" name="id" value="{{ model.id }}">
-    <div class="container">
+    <div class="container mb-3">
       <div class="row">
         <div class="col">
           <p style="line-height:1.2rem;">
@@ -29,11 +29,14 @@
           </div>
         </div>
       {%- endif %}
+      <div class="row mwl-table-heading">
+        <div class="col">Revision</div>
+      </div>
       {% for rev in model.revisions %}
         {%- assign as_of_string = rev.as_of | date: "o" -%}
         {%- assign as_of_id = "rev_" | append: as_of_string | replace: "\.", "_" | replace: ":", "-" -%}
-        <div id="{{ as_of_id }}" class="row mb-3">
+        <div id="{{ as_of_id }}" class="row pb-3 mwl-table-detail">
-          <div class="col-12 mb-3">
+          <div class="col-12 mb-1">
             {{ rev.as_of_local | date: "MMMM d, yyyy" }} at {{ rev.as_of_local | date: "h:mmtt" | downcase }}
             <span class="badge bg-secondary text-uppercase ms-2">{{ rev.format }}</span>
             {%- if forloop.first %}
@@ -50,20 +53,14 @@
                 <span class="text-muted"> &bull; </span>
                 <a href="{{ rev_restore }}" hx-post="{{ rev_restore }}">Restore as Current</a>
                 <span class="text-muted"> &bull; </span>
-                <a href="{{ rev_delete }}" hx-post="{{ rev_delete }}" hx-target="#{{ as_of_id }}" hx-swap="outerHtml"
+                <a href="{{ rev_delete }}" hx-post="{{ rev_delete }}" hx-target="#{{ as_of_id }}" hx-swap="outerHTML"
                    class="text-danger">
                   Delete
                 </a>
               </small>
             {% endunless %}
           </div>
-          {% unless forloop.first %}
+          {% unless forloop.first %}<div id="{{ as_of_id }}_preview" class="col-12"></div>{% endunless %}
-            <div class="col-12 mb-3">
-              <div id="{{ as_of_id }}_preview" class="mwl-revision-preview">
-                <span class="text-muted fst-italic">preview not loaded</span>
-              </div>
-            </div>
-          {% endunless %}
         </div>
       {% endfor %}
     </div>

src/admin-theme/wwwroot/admin.css

@@ -87,4 +87,8 @@ a.text-danger:link:hover, a.text-danger:visited:hover {
 }
 .mwl-revision-preview {
   max-height: 90vh;
+  overflow: auto;
+  border: solid 1px black;
+  border-radius: .5rem;
+  padding: .5rem;
 }